Cloning method Discussion Thread: How to install a map update directly to a SD card.

 

NOTE: This article has been updated and added as a FAQ. Please refer to the updated article here:
FAQ: Garmin Maps | Cloning Method: Install a Map Update Directly to the SD Card.

I posted this over on the GPS Review forum and thought it might be useful to the POI Factory members. This technique was suggested by member Boyd on that forum. I took his idea and tested it with my two nuvis (755T and 855).

You may have already noticed a certain peculiarity in Garmin software. If you have a removable drive on your computer (SD card or thumb drive) and create a \Garmin folder at the root of this drive, then copy the file GarminDevice.xml from your nuvi into this folder, the Garmin programs like POI Loader and my.Garmin.com seem to recognize the removable drive as a nuvi. Boyd speculated that you might be able to use this quirk to fool the map update installer and directly install a map update to a SD card.

It took some experimentation and several tries, but I was able to install the complete map on SD with both of my nuvis. Both nuvis operate correctly with ALL of the NA map data on the SD card. Here is a summary of the steps I used to install maps directly to the SD card:

1) Do a complete backup of your nuvi BEFORE you attempt this procedure. This MAY allow you to recover your nuvi if something goes wrong.

2) Use WebUpdater to make sure you have the latest software on your nuvi before you try this. If you have old software, you will have trouble with the map download because my.Garmin.com will try to do a software update on your (fake nuvi) SD card prior to the map download!

3) Start with a clean SD card in your computer or SD card reader. Make sure it is formatted FAT32. Create the \Garmin folder. Connect your nuvi to the computer in data mode and copy file GarminDevice.xml from the \Garmin folder on the nuvi into the \Garmin folder on the SD card. [Nuvi 8xx series only: Copy the complete ASR folder and its contents from the \Garmin folder on the nuvi into the \Garmin folder of the SD card.]

4) Safely remove the nuvi from the computer, but leave the SD card mounted on the computer. Log into my.Garmin.com. To verify that the SD card is recognized as your nuvi, go to the myDashboard tab and click on "Scan for devices". Your SD card should show up as your nuvi model in the drop down box. (Note: If you didn't remove your real nuvi from the computer as suggested, it will appear twice in the drop down box ... once for the real nuvi and once for your fake nuvi SD card. You won't be able to tell which is which!)

5) On myGarmin, click on the myMaps tab, select the map download link and use option 2 (Map update installer). Proceed to download and install the map files to the SD card. When the map update installer completes, all new map files are on the SD card in the \Garmin folder: gmapprom.img, gmapprom.gma, gmapprom.unl. On some models you will also have files gmaptz.img, gmap3D.img and DnnnnnnnA.JCV (in the \Garmin\JCV folder). Make sure all files are sucessfully downloaded to the SD card before continuing.

6) If your nuvi supports Junction View, this would be a good time to check the DnnnnnnnA.JCV file that was downloaded to the SD card. If you got the small file and want the large one, you may as well replace it now. Use the link provided elsewhere in the forum to download the large JCV file and copy it to the SD card in the \Garmin\JCV folder. Delete the small JCV file that was downloaded by the map update installer.

7) Connect the nuvi to the PC in data mode and delete the following files from the \Garmin folder on the nuvi internal drive: gmapprom.img, gmapprom.gma, and gmapprom.unl. Also delete file GMAP3D.img and the complete \JCV folder and its contents if they are present on your nuvi. [Nuvi 8xx series only: Delete the ASR folder and its contents from the \Garmin folder of your nuvi.]

8) If present, copy file gmaptz.img from the SD card back into the \Garmin folder of the nuvi. [Nuvi 8xx series only: Copy the entire updated ASR folder and its contents from the SD card back into the \Garmin folder of the nuvi.]

9) On the SD card rename the following files gmapprom.img to gmapsupp.img, gmapprom.gma to gmapsupp.gma and gmapprom.unl to gmapsupp.unl. Delete file GarminDevice.xml from the SD card, so it will no longer show up as a fake nuvi in Garmin software.

10) Safely remove the SD card and nuvi from the computer. Install the SD card in the nuvi.

11) Boot the nuvi, go to Tools > Settings > map > map info and make sure the full NA map (and 3D map if your model supports it) show up and are checked.

12) Test the nuvi to make sure all map detail is working.

On the 755T, the detail NA maps, 3D map, and JCV file all work correctly from the SD card. The only file from the map download that has to be on the internal drive is the gmaptz.img time zone file. After completing this procedure with CN NA 2012.30, I had 3.5 GB of free space on the 755T's 4 GB internal drive.

On the 855, the speech recognition files are updated as part of the map update. The easiest way I found to handle this was to copy the ASR folder to the SD card, perform the map install, then copy the updated ASR folder back to the nuvi. These steps are included in the above procedure.

This procedure worked well for me, but be aware that you are removing your detail map files from the internal storage of your nuvi. TRY IT AT YOUR OWN RISK! Note that these steps are for the older 7x5 and 8x5 nuvis that do not have the hidden .system folder and enhanced map naming features. It seems likely that the procedure can be easily adapted to the other nuvi models of this generation like the 2xx, 7xx and 8xx. I am not sure what additional considerations there are for the newer 1xxx, 2xxx and 3xxx models that have the .system folder. If anyone tries this, please post your results here.

--
Alan - Android Auto, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon
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Thanks!

I installed new maps on my 885t over the weekend using this cloning method. I lost a 765t using Garmin express. Something bad happened during the map update and now the 765t is useless. It is not recognized by my computer so I cannot load the backup files With that background, I was very interested in a method to update maps without connecting the Nuvi to Garmin Express. This works great! My biggest issue was the mp3 files I keep on the SD card. I had to get rid of a few to put the map and the mp3s on the same SD. Not a huge issue. I will also use this cloning method on my next map update to my 2497.

@JimD1

Glad you found the cloning method useful. It sounds like you may need a larger SD card so you can keep your MP3 files. Another option is to move some of the files off the SD and back to the nuvi itself ... whatever will fit, like the ASR files, JCV file or even the map itself. On my 855, I actually keep the map (gmapprom.*) and ASR files on the nuvi and put the JCV file on the SD card.

You might actually still be able to recover your bricked 765. It is not easy, but has been successfully done by many nuvi owners. Go to the GPSPassion foruum and search for preboot mode and Garmin Cure3.

--
Alan - Android Auto, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon

Cloning question for 3597

Alan I don't have much space left on my 3597 and will most probably have to load the maps on a SD card next time around & have a couple of questions concerning this.

On my 255W using your cloning procedure, I have the gmapbmap on the unit and the gmapsupp.img, gmapsupp.gma and gmapsupp.unl on the SD card. There are no previous/old maps on the unit itself just the gmapbmap as I have deleted the old mapset.

1- Can I do the same on the 3597 and just leave the gmapbmap on the unit & delete the old mapset files ?

2- When I move the new JCV folder within the \.system folder on the SD card should I delete the old JCV folder or all of it's contents on the unit or should I just leave it as is ? (If we leave it as is there will be two JCV folders.)

3- If I understand correctly all the other files downloaded onto the SD card (ASR,SID,SQLITE,GMAPDEM + GMAPTZ) should be copied and put onto the unit.

Thanking you in advance for your time and help in this matter smile

--
Nüvi 255WT with nüMaps Lifetime North America born on 602117815 / Nüvi 3597LMTHD born on 805972514 / I love Friday’s except when I’m on holidays ~ canuk

Map updates to SD cards

canuk wrote:

Alan I don't have much space left on my 3597 and will most probably have to load the maps on a SD card next time around & have a couple of questions concerning this.

Ah, thanks for the tip. I looked at my nuvi 3597, and with all the added English language voices I've installed:

http://www.poi-factory.com/node/42708

I'm down to 206MB of free space and will likely need to install a future map update to a SD card pretty soon too.

You certainly can use the cloning technique to install a future map update to a SD card and as explained in the cloning faq, there are some advantages to doing the map update that way. The downside is the manual effort expended to perform a cloning map update. I'll leave it to alandb to answer your questions.

But unlike your 255W which is not offered a map update to a SD card when the nuvi has insufficient space, the 3597 will automagically be offered the full map update to a SD card when a future full map update will no longer fit in the nuvi's storage. This reply is just to let you know that your 3597 will be able to install all of North America to a SD card by default when the time comes, and that it is not necessary to use the cloning technique.

Once again, thanks for making me look to my 3597's space and realizing that I will quite possibly be updating its map to a SD card quite possibly even with the next map update. shock

I've found

canuk wrote:

Alan I don't have much space left on my 3597 and will most probably have to load the maps on a SD card next time around & have a couple of questions concerning this.

On my 255W using your cloning procedure, I have the gmapbmap on the unit and the gmapsupp.img, gmapsupp.gma and gmapsupp.unl on the SD card. There are no previous/old maps on the unit itself just the gmapbmap as I have deleted the old mapset.

1- Can I do the same on the 3597 and just leave the gmapbmap on the unit & delete the old mapset files ?

2- When I move the new JCV folder within the \.system folder on the SD card should I delete the old JCV folder or all of it's contents on the unit or should I just leave it as is ? (If we leave it as is there will be two JCV folders.)

3- If I understand correctly all the other files downloaded onto the SD card (ASR,SID,SQLITE,GMAPDEM + GMAPTZ) should be copied and put onto the unit.

Thanking you in advance for your time and help in this matter smile

I've found that:

1: I move all the new map files on the SD card to the Nuvi except the gmapprom files. Those I move to the Map folder on the card, renaming them to MapUpdate#.extension (example 2017.20.img, 2017.20.gma, etc).

2. I move the JCV file to the Nuvi and overwrite the one that is currently on the device.

3. That's what I do, again overwriting the old files on the device.

The biggest space hog is the gmapprom files and leaving them on the SD card while moving the other files to the Nuvi leaves me with about 2.5Gb of free space on the 3597. I've done this for all of the last number of map updates and I've really happy with the how the Nuvi is working.

The one thing I would mention is that I keep a copy of the older gmapdem file which is much larger than the one that seems to come with the updates now and is the right name which doesn't always happen anymore. No matter what gmapdem file the map update gives me I overwrite it with the older one I have saved.

--
Nuvi 350, 760, 1695LM, 3790LMT, 2460LMT, 3597LMTHD, DriveLuxe 50LMTHD, DriveSmart 61, Garmin Backup Camera 40 and TomTom XXL540s.

@ Rick

Thanks for the explanation it's extremely clear. I'll try the same for the next map update and just put the gmappromimg, gmapprom.gma + gmapprom.unl on the SD card.

I'll also delete the three old files from the unit itself as I have always done on my 255W as I have no need for them.

Concerning the gmapdem file, what size is the large file as I have always taken the one that has been downloaded with the newest mapset and transfered in onto the unit ?

--
Nüvi 255WT with nüMaps Lifetime North America born on 602117815 / Nüvi 3597LMTHD born on 805972514 / I love Friday’s except when I’m on holidays ~ canuk

The

The gmapdem file I use is dated 4/23/2010 and is 1.198,560Kb in size.

--
Nuvi 350, 760, 1695LM, 3790LMT, 2460LMT, 3597LMTHD, DriveLuxe 50LMTHD, DriveSmart 61, Garmin Backup Camera 40 and TomTom XXL540s.

I just checked &

t923347 wrote:

The gmapdem file I use is dated 4/23/2010 and is 1.198,560Kb in size.

Since day 1 my size is 608,976KB. Do you know what the difference is and if copies are available ?

--
Nüvi 255WT with nüMaps Lifetime North America born on 602117815 / Nüvi 3597LMTHD born on 805972514 / I love Friday’s except when I’m on holidays ~ canuk

gmapdem

t923347 wrote:

The gmapdem file I use is dated 4/23/2010 and is 1.198,560Kb in size.

Did we ever decide if the larger gmapdem file offers better detail or if it shows the same detail as the smaller file but is just less compressed?

Also, as far as I remember, the larger version has never been offered to users as is routinely done for the large jcv file. Is this still true?

My strategy

My strategy when my 3597 becomes short on space is to keep as much internal as possible and move the least used files off to SD. I have used this same strategy on my old nuvi 855 ... first moving the ASR and SRX files to SD, and now with the latest map update, also moving the large JCV file to SD. I still keep the map files in internal storage. My thinking is that the unit runs more smoothly when the most commonly accessed files (like the map) are in internal storage. I have no proof of this ... just my hunch.

So, when it becomes necessary on the 3597 to put some files on SD, I will probably start with the SID files, then the ASR/SRX files. I think these will need to go in folders \Garmin\SID and \Garmin\ASR on the SD of the 3597. Note that I have not really tested this yet, so can't say for sure that it will work.

--
Alan - Android Auto, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon

very interesting!

I think you did an excellent job on breaking it all down for everyone!
but I don't think personally I would put that much work in for an old nuvi.

Thanks gentlemen

It's definitely interesting the different ways we can go about placing the various files on either the unit itself or the SD card.

My thoughts:

It's been a couple of years now that I've been putting the mapset of my 255W on the SD card and personally I have never noticed a differnce in speed nor any other problem.

I know that Garmin states in their FAQ that one can use any speed rating SD card but I try and favor the odds and put a card that is able to read faster.

Alot of people just think of the writing speed (important when taking pictures or video clips) but there's also the read speed of the card.

I have no idea nor proof that my SD card read speed improves the overall functioning of the GPS but it works for me smile

--
Nüvi 255WT with nüMaps Lifetime North America born on 602117815 / Nüvi 3597LMTHD born on 805972514 / I love Friday’s except when I’m on holidays ~ canuk

3597

I am down to 338 MB of free space on my 3597. With a little clean up and maybe deleting a few voice files I never use, I think I should be able to get through a couple more map updates without using a SD card. When it does become necessary to use a SD, as I stated above, I will probably leave the map in internal storage and move the ASR/SRX files to SD. That will free up about 1 GB.

--
Alan - Android Auto, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon

Yes

CraigW wrote:

Also, as far as I remember, the larger version has never been offered to users as is routinely done for the large jcv file. Is this still true?

Yes, AFAIK, but on the other hand the large JCV file is no longer offered either.

--
Nuvi 350, 760, 1695LM, 3790LMT, 2460LMT, 3597LMTHD, DriveLuxe 50LMTHD, DriveSmart 61, Garmin Backup Camera 40 and TomTom XXL540s.

Thanks for the very detailed

Thanks for the very detailed post. I can see you put a lot of time into it and it is appreciated.

Used clone method to update 3490LMTHD and didn't get 3D files

I followed the instructions from http://www.poi-factory.com/node/39231 to install the update to a microSD card using GarminMapUpdater 3.3.4. I got all the files listed in http://www.poi-factory.com/node/46132 except:

gmapdem.img
gmap3d.img
gmap3d.gma
gmap3d.unl

Any suggestion as to what could be causing this?

Yes

Pheckphul wrote:

...using GarminMapUpdater 3.3.4....

Any suggestion as to what could be causing this?

Yes. wink

First off, your profile states you have a nuvi 3590. Which is correct: 3490 or 3590? I ask because the Garmin FAQ doesn't list the 3490 as offering these map overlays.

The problem is not the cloning method or you missing a step or two of the cloning method. The problem is your use of GarminMapUpdater rather than Garmin Express due to a bug in GarminMapUpdater that Garmin has yet to address and fix:

http://www.poi-factory.com/node/44415

If you have a backup of the missing files, you could try copying them to the nuvi. You could also look to see if you actually have the map and associated files under different file names (see FAQ). You could reinstall the map using Garmin Express which may restore both missing maps. Finally, I think there may be web sites that will offer the files and folks here may be able to steer you to the safest of these sites. Note that folks here at the POI Factory have gotten the go-ahead from Garmin to share missing files like these (as opposed to sharing unlocked City Navigator map files which are not acceptable for discussion or sharing).

There is a small chance that the maps are there on your nuvi but they've been unchecked. See the FAQ to see if your myMaps page has the missing maps but they're unchecked. If so, the quick and simple fix is to recheck these maps.

Good luck and let us know how you fared.

And, of course, welcome to The Factory!

Thanx!

CraigW wrote:

First off, your profile states you have a nuvi 3590. Which is correct: 3490 or 3590? I ask because the Garmin FAQ doesn't list the 3490 as offering these map overlays.

Sorry; typo. I do indeed have a 3590LMTHD

CraigW wrote:

The problem is not the cloning method or you missing a step or two of the cloning method. The problem is your use of GarminMapUpdater rather than Garmin Express due to a bug in GarminMapUpdater that Garmin has yet to address and fix:

http://www.poi-factory.com/node/44415

I used GarminMapUpdater because I liked its progress feedback better than Express'. It just turns out that I had tried GarminMapUpdater last (after having problems with Express not updating my 3590 due to space constraints, which is what started all of this) and discovered I liked it better. grin

If you have a backup of the missing files, you could try copying them to the nuvi. You could also look to see if you actually have the map and associated files under different file names (see FAQ).

Yes, I have a backup of the files. I tried plopping them down onto the microSD card to see it that would trigger the update, but it didn't help; I was just left with the files from 2015.

CraigW wrote:

Good luck and let us know how you fared.

And, of course, welcome to The Factory!

Thank you for the welcome and the pointers.

I'll try using Garmin Express and see if that does the trick and report back on the results.

Cheers!

Done!

CraigW wrote:

Good luck and let us know how you fared.

Once I followed your advice and used Garmin Express everything worked as it should. Now to do my wife's 3590....

Thank you very much for the help!

Maybe not

This might get interesting.
My 3580 (3590LMT with out Digital 3D traffic) only has 500MB free. Which means the map is going to have to go onto the SD card sooner or later. It already has a gmapsupp.img and gmapsupp.unl on it. There are 4 different topo maps and one bilingual Dictionary on the sd card, which takes up 3.5GB of 8. I'm not seeing any of this being done with out a second sd card. Not hard to lose it.

--
nüvi®3580LMT,nüvi®2598LMT| We do not live in Igloo's, and do not all ride to work on snow mobiles.

One solution ...

I am not sure I fully understand the problem you are anticipating, but if you want to eliminate the gmapsupp file that is currently on the sd card, one solution might be to create a \Map folder on the SD card and move the gmapsupp files into that folder, then rename them to something else.

--
Alan - Android Auto, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon

Yes ...

... Simple enough to do, and on most new'ish devices no need to even rename them, although I do to a more memorable name.

As for loosing the card, I've been using a nuvi with a card for years and it hasn't dropped out yet, although I do keep a spare card with the files on it in my car just in case ...

--
Where there's a will ... there's a way ... DriveSmart50LMT-D, Nuvi 2508LMT-D, 1490LMT, 1310, Montana 650T, Etrex 20

Blah

sussamb wrote:

... Simple enough to do, and on most new'ish devices no need to even rename them, although I do to a more memorable name.

As for loosing the card, I've been using a nuvi with a card for years and it hasn't dropped out yet, although I do keep a spare card with the files on it in my car just in case ...

not talking about it dropping out, talking about using two cards and storing the other some where.

--
nüvi®3580LMT,nüvi®2598LMT| We do not live in Igloo's, and do not all ride to work on snow mobiles.

....

alandb wrote:

I am not sure I fully understand the problem you are anticipating, but if you want to eliminate the gmapsupp file that is currently on the sd card, one solution might be to create a \Map folder on the SD card and move the gmapsupp files into that folder, then rename them to something else.

This card also has an id.txt file on it. Its needed for the dictionary. Had this way back with my 765T. I added the topo maps to this card later. My topo maps are in a Garmin folder. I Can't leave those two files in there if i transfer my main map in there.
Moving them might work, as long as the nuvi sees them. There's a userdata.adm in a userdata directory also. No idea where that came from. 3 year old file. Either way it will work out. Not like i can really use this unit to go hiking anyway....lol.

--
nüvi®3580LMT,nüvi®2598LMT| We do not live in Igloo's, and do not all ride to work on snow mobiles.

.

Can you have more than 2 active maps on an SD card?

Yes

telecomdigest2 wrote:

Can you have more than 2 active maps on an SD card?

Yes, although it's probably a bad idea to have two routable maps active at the same time.

The appearance of multiple active maps covering the same area may vary with the transparency of maps. A summplemental map designed to be active with a main map may look better than when two maps that were both designed to be standalone maps are active. There's no harm in experimenting.

Yes ...

... You can have many maps selected, the key though is to ensure you don't have maps selected that overlap as that can cause weird routing issues.

--
Where there's a will ... there's a way ... DriveSmart50LMT-D, Nuvi 2508LMT-D, 1490LMT, 1310, Montana 650T, Etrex 20

I got this to work on a C580

Interestingly enough following the same directions for my Nuvi 755T, I was able to get this to work for a C580. Though, the C580 is pretty limited on map sizes these days.

--
-Mark Nuvi 3597, Nuvi 755T, GPSMAP 60CSx, Street Pilot C580

Good Point Sussamb

sussamb wrote:

... You can have many maps selected, the key though is to ensure you don't have maps selected that overlap as that can cause weird routing issues.

Case in point, the North America maps contain maps of Florida,
however, for some reason Garmin has decided to INCLUDE the Florida map on the CN South America Map. This can prove to be an issue when traveling to Florida having a CN South America available on your unit in addition to CN North America.
This may cause routing issues.

See CN South America Coverage:
https://buy.garmin.com/en-US/US/p/98712#coverage

--
Nuvi 2460LMT 2 Units

Multiple maps

CraigW wrote:
telecomdigest2 wrote:

Can you have more than 2 active maps on an SD card?

Yes, although it's probably a bad idea to have two routable maps active at the same time.

The appearance of multiple active maps covering the same area may vary with the transparency of maps. A summplemental map designed to be active with a main map may look better than when two maps that were both designed to be standalone maps are active. There's no harm in experimenting.

muell9k wrote:
sussamb wrote:

... You can have many maps selected, the key though is to ensure you don't have maps selected that overlap as that can cause weird routing issues.

Case in point, the North America maps contain maps of Florida,
however, for some reason Garmin has decided to INCLUDE the Florida map on the CN South America Map. This can prove to be an issue when traveling to Florida having a CN South America available on your unit in addition to CN North America.
This may cause routing issues.

See CN South America Coverage:
https://buy.garmin.com/en-US/US/p/98712#coverage

The ability to enable more than two maps on SD is true for current Garmin models, but not older models which have very restrictive map naming conventions. These restrictions generally apply to the nuvis with 3 digit model numbers. Depending on the model, you may be restricted to two or even just one map on the SD card. Telecomdigest2 who posted the original question doesn't show in his profile which model of Garmin he has, so it is possible he is limited in the number of maps he can enable.

--
Alan - Android Auto, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon

Cloning not the best solution for a StreetPilot.

SDF33 wrote:

Interestingly enough following the same directions for my Nuvi 755T, I was able to get this to work for a C580. Though, the C580 is pretty limited on map sizes these days.

While it is true that cloning will work as a method on your Street Pilot C580, it is really not the best solution for map installation. Because of the 2 GB file size limit and map file naming restrictions on the Street Pilot series, you will not be able to get the full NA map on the SD card using cloning.

A better solution is to use a combination of Garmin Express and MapInstall to split the map into two pieces. Use Garmin Express to install the largest region that will fit in your SP internal storage. Select the option to install to both device and computer, as that will put the full NA map on your computer. After Garmin Express has completed, use the Garmin MapInstall program to install the remaining regions to SD card. This will keep both map files under the 2 GB limit. These FAQ's contain some additional detail:
http://www.poi-factory.com/node/42561
http://www.poi-factory.com/node/31185

--
Alan - Android Auto, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon

Not Clear

I'm not quite getting this yet.
So the idea is to install the Maps onto the sd card. Express will install the maps onto the sd card even if its left in. I've done both ways. Now here's the problem that i have. If i remove all the files that are now on the sd card from the unit it then no longer works right. All i read is that i must delete GarminGarminDevice.xml on the sd card after. The idea was to save space? Am i suppose to keep all the other older files on the main unit that are now obsolete?

--
nüvi®3580LMT,nüvi®2598LMT| We do not live in Igloo's, and do not all ride to work on snow mobiles.

I

I leave the 3 gmapprom files on the SD card. You need to create a Map folder on the card and move the 3 files from the Garmin folder on the card to the Map folder.

Then as alandb's excellent procedures state, you go in to the .system folder on the card and move all the files in all the folders within .system to the exact same place on the Nuvi. There will be files in the .system folder on the Nuvi that are from the previous update and once the new files are copied to the folders containing these old files, the old ones can be deleted from the device.

Since I leave the map files on the SD card, when I'm finished an update there are 3 files in the Map folder on the card and all the other updated files are on the Nuvi with the old version of these files deleted from the GPS.

--
Nuvi 350, 760, 1695LM, 3790LMT, 2460LMT, 3597LMTHD, DriveLuxe 50LMTHD, DriveSmart 61, Garmin Backup Camera 40 and TomTom XXL540s.

It can be confusing.

The cloning procedure on newer devices can be confusing because there are so many files that get downloaded in addition to the gmapprom map files. As Rick said, the general procedure is to move all files other than the map files back to the internal storage of the unit. But the real difficulty is knowing what files from the old version they are replacing (and therefore which old files to delete). Garmin in their infinite wisdom decided to change the names of these auxiliary files with each map update. I am referring to the files in /system/JCV, /system/ASR, /system/SID and /system/SQLite.

That is one of the reasons I try to post these file names in the discussion thread when a new version comes out (see http://www.poi-factory.com/node/46941?page=0#comment-443143 ). But in general, you can usually tell which old files need to be deleted and replaced based on file dates. The main thing is to make sure you have a full backup before you start deleting and copying in the new files from the map update. This will insure you can recover from any mistakes. But I should also say, if you are unsure about what you are doing, cloning may not be a good solution ... just trust Express to do the right thing. There are really only a very few Garmin models (like the nuvi 8xx series) where Garmin Express does not correctly handle SD card install.

--
Alan - Android Auto, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon

Follow the instructions.

t923347 wrote:

...There will be files in the .system folder on the Nuvi that are from the previous update and once the new files are copied to the folders containing these old files, the old ones can be deleted from the device...

Yes, indeed! More than one user here haveused the clone technique but skipped a step or two with a result that the Voice Command files from the older map were not deleted from the nuvi. Being very large files that do nothing when a newer map is installed, users find their device has little to no storage left.

For all using alandb's excellently written clone technique, do carefully follow each step!

alandb or others may correct me if I'm wrong, speed2, but I think the main reason to remove the xml file from the SD card is to prevent Garmin's computer software from getting confused with both the nuvi and SD having the file, and also so that when you use the clone technique again down the road, you'll copy a fresh updated copy of the xml files from the nuvi to the SD card and not use the older xml left on the SD card from an earlier update.

[Later] Curses, foiled again by the Early Bird alandb who beat me to a reply by seconds!

You are correct CraigW.

If you leave GarminDevice.xml on the SD, your nuvi will show up twice in Garmin software such as Express and POILoader. It is almost impossible to tell which is the real device and which is the SD card.

--
Alan - Android Auto, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon

ok

Thanks it works now

--
nüvi®3580LMT,nüvi®2598LMT| We do not live in Igloo's, and do not all ride to work on snow mobiles.

Better now

alandb wrote:

The cloning procedure on newer devices can be confusing because there are so many files that get downloaded in addition to the gmapprom map files.

I think what got me confused is that under installed maps it still shows the 3 map files when pulling the sd card. It boots fine just there's no map to view. So i was thinking i wasn't saving any space. No idea why but it all made sense when t923347 answered my post.

Its all good
thanks

--
nüvi®3580LMT,nüvi®2598LMT| We do not live in Igloo's, and do not all ride to work on snow mobiles.

Additional information.

To add to this discussion, there are files other than the map files (downloaded as gmapprom.*) that can stay on SD card when cloning. I have not fully tested all of this, so take it with a grain of salt and let me know if you find exceptions.

The main thing to be aware of is that in general, the downloaded map files on SD need to go in subfolders of /Garmin rather than subfolders of /.system where the map update downloads them to. Here are the files that can be resident on SD card on newer units with a /.system folder:

Map files: gmapprom.img, gmapprom.gma, gmapprom.unl
Original folder: /.system
SD card folder: /Map
Notes: Do not move the maps named gmapbmap.img, gmapdem.img and gmaptz.img to the SD card. Map files in the Map folder of the SD card can be renamed from gmapprom or gmapsupp to any name of your choosing, but keep the .img, .unl and .gma extensions.

Map files (alternative method): gmapprom.img, gmapprom.gma, gmapprom.unl
Original folder: /.system
SD card folder: /Garmin
Notes: If placed on the SD card in folder /Garmin, the gmapprom files must be renamed to gmapsupp or gmapsup1, keeping the .img, .gma and .unl extensions.

Junction view file - file type: .jcv
Original folder: /.system/JCV
SD card folder: /Garmin/JCV

Voice recognition - file types: .srx, .asr
Original folder: /.system/ASR
SD card folder: /Garmin/ASR
Notes: Do not move .srd files to the SD card. They must remain on the device in folder /.system/ASR

Search Index files - file type: .sid
Original folder: /.system/SID
SD card folder: /Garmin/SID
Notes: The search index files are for advanced features including traffic trends, point addressing, instasearch and fast routing.

IMPORTANT NOTE: This information is based on what I have learned from users in this and other forums. Some of this is difficult to test, so I cannot be absolutely sure of its accuracy. One file I have not seen referenced is the data base contained in folder /.system/SQLite. This file downloaded with a map update has a name something like D3397210A.DB and the name changes with every map update. If anyone knows whether or not this file can be resident on SD (probably in folder /Garmin/SQLite) please enlighten me.

Also to note: If I had full confidence in this information, I would add it to the cloning FAQ. I am reasonably confident about the maps and the .jcv, .asr and .srx files, but I don't really know how to test the .sid or .db files.

--
Alan - Android Auto, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon

I don't rename the files using this method

alandb wrote:

Map files (alternative method): gmapprom.img, gmapprom.gma, gmapprom.unl
Original folder: /.system
SD card folder: /Garmin
Notes: If placed on the SD card in folder /Garmin, the gmapprom files must be renamed to gmapsupp or gmapsup1, keeping the .img, .gma and .unl extensions.

On my 3597:

On my SD card I created a folder named garmin (using a lowercase g)

I place gmapprom.img, gmapprom.gma, gmapprom.unl & do not rename these files & the unit works as expected smile

On my 255WT on the other hand, I must rename the three files when placing them onto my SD Card.

--
Nüvi 255WT with nüMaps Lifetime North America born on 602117815 / Nüvi 3597LMTHD born on 805972514 / I love Friday’s except when I’m on holidays ~ canuk

Thanks Canuk ...

I am always learning something new about Garmin's quirks. So now I don't know if I dreamed up that naming restriction or if it is model specific.

--
Alan - Android Auto, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon

Model specific?

alandb wrote:

I am always learning something new about Garmin's quirks. So now I don't know if I dreamed up that naming restriction or if it is model specific.

This also surprised me. Thanks, canuk. Now knowing this, I'd bet a quarter that it's model specific. I won't guarantee that all that follows is correct but it may be. wink Many of the older devices had very specific map naming conventions, some so restrictive that only one map could be present in the SD card (the old gmapsupp requirement) while others could handle maybe two (gmapsup1 and gmapsup2). More recently in the past couple or so years devices could accept maps with any file name including, apparently, gmapprom in the SD card for the nuvi 3597! This leads me to think that all the 'accept-any-filename' devices like the 3597 will accept gmapprom in the SD card.

I do like the ability to use any filename. My 3597 has a map named 2015MVUM_Coconino.img. When it comes time to update or remove old supplemental maps, names like this make it hard to confuse which file goes with which map.

Of course, it's possible that gmapprom can be used in the SD card for all models. This'd be a quick test for a few folks with older devices like the 7xx, 8xx, 1xxx series, etc. to see if a gmapprom on the SD card can be read.

Thanks alandb

Knowing I don't have to move all of the files off the card to the Nuvi will be a great time saver. Some of those files are BIG and take a long time to move.

--
Nuvi 350, 760, 1695LM, 3790LMT, 2460LMT, 3597LMTHD, DriveLuxe 50LMTHD, DriveSmart 61, Garmin Backup Camera 40 and TomTom XXL540s.

Test 1

CraigW wrote:

...
Of course, it's possible that gmapprom can be used in the SD card for all models. This'd be a quick test for a few folks with older devices like the 7xx, 8xx, 1xxx series, etc. to see if a gmapprom on the SD card can be read.

In addition to canuk's 255WT, my 750 will not accept gmapprom in the SD card so the big question is how many of the newer devices (that accept any-name map files) will accept gmapprom in the SD.

I wonder if there's a list (or a first-appearance device) of the Garmin devices that accept any filenames for maps...hmm, in this thread and FAQ:

http://www.poi-factory.com/node/32680

http://www.poi-factory.com/node/43760

DorkusNimrod wrote that:

the first nuvis that could accept any filename in the nuvi for a mapset was the Garmin 1xxx series. This may also be when gmapprom would be acceptable as a map filename in the SD card. Do we have a 1xxx owner who can test this?

Differences from one model to another

I believe that all Garmin units are designed to get you from point A to point B but do behave somewhat differently from one model to another.

With the old 2x5 series (205W / 255W /265WT) the user manual states being able to add one via to the active "route"/destination. I've added 6 or 7 and it has always worked well.

If I decided to purposely skip a via the unit would attempt to reroute me twice back to the missed via but then then it would automatically route me to the next via I had preprogrammed.

Owners of other models have stated that their GPS will only accept one via & will continuously try to reroute you to the missed via.

I believe that the map files on the SD Card & the specific way they are named (using supp or not) also varies from one model to another.

For those that are hesitant in using your GPS with the maps on the SD Card there's absolutely nothing to worry about. I've been using this method for a couple of years now & honestly don't see a difference between having the maps on the unit itself or on the SD Card. On my 3597 the unit now has over 2GB of free space & works as expected.

Many many thanks once again to Alandb for having shared with us his cloning method which I find is absolutely amazing & which I use for each and every map update smile

--
Nüvi 255WT with nüMaps Lifetime North America born on 602117815 / Nüvi 3597LMTHD born on 805972514 / I love Friday’s except when I’m on holidays ~ canuk

I thought this method wasn't

I thought this method wasn't needed anymore, that Garmin Express will use the SDCard automatically?

Well ...

... It will but some folks like a but of control over what's happening. By downloading to a clone should things go wrong your device isn't affected.

--
Where there's a will ... there's a way ... DriveSmart50LMT-D, Nuvi 2508LMT-D, 1490LMT, 1310, Montana 650T, Etrex 20

For some, yes

HowardZ wrote:

I thought this method wasn't needed anymore, that Garmin Express will use the SDCard automatically?

Some devices aren't given the SD option:

http://www.poi-factory.com/node/44310

Additionally, some folks use the clone method for map updates as a safer method for map updates even though it requires a bit of extra work and if done improperly, can result in problems.

Files on SD.

I have been doing some testing on my 3597 of putting the files mentioned in my post above on the SD card and disabling them in internal memory. First let me say that my friend Canuk is correct about the gmapprom name being recognized in the /Garmin folder of the SD card. In fact, it seems to take any name just like it does in the /Map folder. I have my 2018.10 NA map named /Garmin/NorthAmerica.img and it is recognized. This is apparently a change that was made via software updates (at least on some models). I found a reference to it in another forum for a 3490 nuvi.

I also discovered that the gmapdem.img and gmap3d.* map files can go on SD in the /Garmin folder. Those two were not on my original list. The one I am still not sure about is D3397210A.DB file in /.system/SQLite. I think this file contains the Traffic Trends data base. I have now put this file on SD in /Garmin/SQLite and renamed it in internal memory. With this, I now have all files that downloaded with the 2018.10 map update on SD and all these files in internal storage are disabled by renaming them (added .sav as the extension). From what I can tell everything seems to be working, although I normally have Traffic Trends disabled. I will try to reenable it and see what happens.

--
Alan - Android Auto, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon

MapUpdater.

It appears with the 2018.20 CN NA map update that Garmin is no longer supporting Garmin MapUpdater. Because of this I have removed all references to MapUpdater from the cloning FAQ. I have kept a backup copy of the original so I can restore that content if Garmin ever changes their position on MapUpdater.

--
Alan - Android Auto, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon
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